Calender, including upper and lower rollers with improved guiding and lifting means for central roller means



Dec. 12, 1950 J. DUNGLER 2,533,724

CALENDAR, INCLUDING UPPER AND'LOWER ROLLERS wrm IMPROVED GUIDING ANDLIFTING MEANS FOR CENTRAL ROLLER MEANS Filed June 8, 1946 2 sheets-Sheet1 Fig. 7

.zwnewrwz JUME/VDZM/GZFR Dec. 12, 1950 J. DUNGLER 2,533,724

- CALENDAR, INCLUDING UPPER AND LOWER ROLLERS WITH IMPROVED GUIDING ANDLIFTING MEANS FOR CENTRAL ROLLER MEANS Filed June 8, 1946 2 Sheets-Sheet2 .lzyrwroe JULIE/V Dal/mu ER Patented Dec. 12, 1950 CALENDER, INCLUDINGUPPER i AND LOWER; ROLLERS WITH IMPROVED GUIDING AND- LIFTING MEANS FORACENTRAL ROLLER.

MEANS J ulien Dungler, Basel, Switzerland Application June 8, 1946,Serial N 675,361 In France February .20,1946 '1- IV The invention refersto a "novel kind of calender for dressing fabrics, paper or othermaterials.

The known calenders comprise a number of rollers which generallyrest onone another (vertical calenders), or which are sometimes located side bysidelhorizontal calenders), and which are made of various materials,said rollers being subjected to pressure during operation of thecalender. Often in such arrangements, metal rollers alternate with hardand flexible rollers made of compressed fibrous material,' for instancelayers of paper or layers of fibre or of cotton or other fabric, whichhas been subjected to very high pressure'and'then turned "on a lathe soas to give these rollers a perfectly'cylindrical shape.

It is known that such classical types of "calende'rs, comprising a largetotal number of rollers, eight, ten or twelve'for instance, areexpensive, heavy, bulky, difficult to operate and involve high'upke'epcosts.

As regards the rollers made of compressed fibrous material which;precisely, require to be faced periodically, they are diflicult toremove; furthermore, owing to the difference which soon appears in theirdiameters or in their hardness, and by the fact of the veryheavy;pressure to which they are subjected and of their contact with theheated metal rollers, local heating occurs at their periphery which mayquickly deteriorate them.

The purpose-of theinvention-is to eliminate all the drawbacks of theclassical types of calenders, and it has for its object a calender-of anovel kind which is characterized, in principle, by the fact that itcomprises a set of lower rollers mounted on a fixed frame, a centralroller made of compressed fibrous material resting on said lowerrollers, and a'set' of upper rollers resting on'the'central' fibreroller, the upper rollers and the central roller being mounted on acommon upper frame-adapted-to receive a lifting movement relatively tothe fixed frame supporting the set of lower rollers, and the centralfibre roller being, furthermore, mounted in the common upper frame whichcan be lifted so as to enable it to move away from the upper rollers andthe lower rollers owing to the actual lifting of the said upper frame.

By constructing calenders in accordance with the principle which hasjust been explained, machines are obtained which, for an equivalentwork, are of considerably reduced size and weight and which,furthermore, provide a substantial simplification of the accessorymembers as a -set'of metal rollers 6 and l.

2 whole, and-are easyto operate and to service. Thus, for instance, witha single central roller made of fibrous material and four metal rollers(two lower and two upper), the same work is obtained as with a classicaleight-roller calender, four rollers of which are made of fibrousmaterial. On the other hand, the central roller made of fibrous material'no longer requires to have bearings and may merely rest against thelower metal rollers, a very simple lateral guiding being sufficient tokeep it accurately .in the desired position. It can be instantly.removed without any difficulty, after the upper frame has been lifted.Furthermore,'owing to the fact that it is driven by'contactsimultaneously by'all of the metal rollers, all'risk of uneven heatingofits surface is'practically eliminated, Wherebyits life is considerablyincreased.

In order to enable'the invention to "be better understood, an embodimentof a calender of the novel kind which'is' the object of the invention,is described hereinafter and diagrammatically illustrated, merely by wayof a non-limitative example, in the accompanying drawings, in

which:

Fig. 1 is a View inside elevation of "the calender, of which Fig. 2 isa'view in front elevation,-

Fig; 3' being a diagram of the transmission of' the movement to themetal rollers driving the fiber roller by contact.

In thesefigures, l is the lower frame carrying the lower set of metalrollers 2 and 3; 4 are areshaped lateral arms'ada'ptedto pivot 'about aspindlei 0f the frame I andcarrying the upper Each of thearms 4has alower extension "or cheek 4 provided with a slidewaytin which is looselyengaged a stub -axle-ll screwed in the end of the shaft of a roller 9made of compressed fibrous material Which rests on thelower rollers 2-and 3, is retained at -thesides between the-cheeks =4 and on which bearthe upper rollers 6 "and 1.

The-freeend of "each-supporting arm 4 is pivotally connected to theupper part forming a clevis m of a rod Ill which is pivotally connectedat its other end lil to a lever II adapted to pivot at l2 on the frameI, the two levers H accommodating at the rear end means enabling thepressure which they exert on the upper frame 4 and, consequently, on therollers of the calender, to be varied, for instance weights I3, thenumber of which can be altered at will. Of course, this set of leversmay be replaced by a hydraulic device, also of known type.

By slightly lifting the upper frame 4 by swinging it about the pivot 5,by the operation of a lever l4 provided with an eccentric I5 acting onthe set of articulated levers, the slideways 8 are shifted relatively tothe stub-axles 9 of the roller 9 made of fibrous material and,consequently, the said roller made of fibrous material is disengagedfrom the upper metal rollers 6 and 1. When the stub-axles 9 have reachedthe end of\ the slideways 8, the lifting movement of the articulatedarms forming the upper frame continues and the roller 9 is alsodisengaged from the lower metal rollers 2 and 3. In this position, thefabric 16 to be treated can readily be inserted.

When it is desired to remove the roller 9 made of fibrous material,after having moved it out of engagement with the upper rollers 6 and i,the pivots connecting the clevises ll! of the rod to the ends of thearms 4 are removed and the stud-axles 9 are unscrewed to remove themfrom the slideways 8. The lifting of the upper frame 4 is then continuedby means of a hoist in order to disengage it completely from the roller9.

In the drawing, I6 designates the fabric subjected to calendering, ii aroller mounted on a rear support l8 and receiving the fabric as it comesout of the machine, 19 a mechanical folder of known type, and 20 acarriage receiving the folded fabric.

The drive of the metal rollers 2 and 3,6 and 'l, is obtained, forinstance, by means of an electric motor 2|, through the intermediary ofa driving chain 22 driving a sprocket wheel 23 which is loosely mountedon the overhanging end 5 of the spindle 5 of the pivoting upper frame 4,and on which aredependent sprocket wheels 25 and 26 which in their turntransmit,

respectively by means of chains 2? and 28, the rotary movement to thesprocket wheels 29 and 30 of the rollers 6 and 7 and to the sprocketwheels 3| and 32 of the rollers 2 and 3. Owing to the arrangementadopted, it is possible to swing the supporting arms 4 about the pivot 5without removing any movement transmitting memberl' 1 I The same appliesto the device for heating the metal rollers, the pipe 33 for supplyingthe heating steam opening into a box 34, which is coaxial with the pivot5 and'from which extend, with the interposition of elbow-joints, thepipes 35 and 36 for distributing the steam to the upper and lower metalrollers respectively.

It is of course understood that the invention is in no waylimited to aparticular embodiment and that it is possible, on the contrary, withoutexceeding the scope of the invention, to imagine modifications,improvements of details and uses of equivalent means.

For certain applications, it is possible to replace, for instance, oneof the metal rollers by a roller made of fibrous material; thus, inparticular, when it is desired that the fabric should pass between twofibrous rollers, the upper roller "i may be made of fibrous material.

Having thus described the invention, what is claimed as new and desiredto be secured by Letters Patent, is:

1. In a calender; a fixed lower frame, an arcshaped upper frame pivotedfor swinging movement with respect to said lower frame, lower rollersfixedly mormted for rotation on said lower frame, upper rollers fixedlymounted for rotation on said upper frame, a central roller positionedbetween said upper and lower rollers, spaced parallel guide lugsdepending from said upper frame, said guide lugs being provided withelongated slideways having upper and lower limits, said central rollerhaving axles engaged for sliding movement within said slideways and bein-adapted to be lifted upon swinging movement of said upper frame to theextent that said axles abut against said lower limits wherebydisengagement of said central roller from said upper and lower rollerswill be brought about;

2. In a calender having an upper and a lower frame; lower rollersmounted on said lower frame, upper rollers mounted on said upper framewhich is pivotally connected at one of its ends for swinging movement tosaid lower frame, a central roller positioned between said upper andlower rollers, guide lugs on said upper frame and provided with verticalslideways, and stubaxles removably mounted on said central roller andloosely engagingsaid slideways, said slideways terminating in upper andlower ends, whereby upon initial outward swinging movement of said upperframe away from said lower frame said central roller engages said lowerends and will be spaced from said upper rollers "and subsequently uponcompletion of said outward movement be disengaged from said lowerrollers.

3. A calender according to claim 1, in which said guide lugs form anintegral part with said upper frame from which they extend in thedirection of said central roller.

JULIEN DUNGLER.

REFERENCES CITED The following references are of, record in the file ofthis patent:v

UNITED STATES PATENTS Great Britain 1908

